Hi Alvin,
I first extracted all the drivers from my Windows 11 install using "dism". Afterward installed Windows 10 and pointed all the missing drivers to that folder. All the devices show installed in my device manager now. It isn't necessary to download the drivers from the Samsung website or Microsoft store app.
This is the command I used inside Windows 11 to obtain all the drivers:
"DISM /online /export-driver /destination:D:\Drivers" where "D:\Drivers" refers to the location where you want to export the drivers.
If you have already overwritten the Windows 11, you need to find someone with a working Windows 11 install in their Galaxy Book to help you out.